Very cool to see such a detailed report about finances.
The expenses listed here are accounting for 100% of the expenses paid by the organization. If you go fetch the 990 from the IRS and look at the totals, it will match dollar-for-dollar, cent-for-cent. So if I deleted taxes from this report, you would hopefully all be wondering, where did that $13,089.07 go?
Happy to answer any other questions.
Edit: I see the question is about income tax vs payroll tax categorization. As this isn't my area of expertise and it's getting late, I'll wait until tomorrow to check carefully and make any necessary clarifications.